Dedrick \d(e)-dri-ck, ded-rick\ as a boy's name is pronounced DEE-drik. It is of Danish and Old German origin, and the meaning of Dedrick is "power of the tribe". Variant of Diedrick and Theodoric. Also the source for Derek. Dieter is a German form. Football player Dedric Ward.
For more information, see also the related name Dirk.